Inlet-valve gear for internal-combustion engines.



No. 767,794. PATENTED AUG. 16, 1904.

INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG. 3. 1903.

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No. 767,794. PATENTED AUG. 16, 1904.

A. P. BRUSH. I INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG. 3. 1903.

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A. P. BRUSH. v INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

APPLIOAHON FILED AUG. 3. 1903.

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UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

ALANSON P. BRUSH, OF DETROIT, MICHIGAN.

INLET-VALVE GEAR FOR INTERNAL-COMBUSTION ENGINES.

SPECIFICATION forming part of Letters Patent No. 767,794, dated August16, 1904.

Application filed August 3, 1903. Serial No. 168,000. (No model.)

To all whom it may concern:

Be it known that I, ALANsoN P. BRUsH, a citizen of the United States,residing at Detroit, county of WVayne, State of Michigan, have inventedacertain new and useful Improvement in Inlet-Valve Gears for Internal-Combustion Engines, of which the following is a specification, referencebeing had to the accompanying drawings, which form a part of thisspecification.

. My invention has for its object certain new and useful improvements ininlet-valve gear for internal-combustion engines.

It consists of the construction, combination, and arrangement of deviceshereinafter described and claimed, and illustrated in the accompanyingdrawings, in which- Figure 1 is a view in side elevation. Fig. 2 is aview in side elevation, showing parts broken away. Fig. 3 is a planview. Fig. 4 is a view in side elevation, illustrating a modification ofthe invention. Fig. 5 is a detail view showing the parts broken away tomore fully illustrate the end of the cam-rod and actuated rolls. Fig. 6is a partial plan view with the rocker removed. Fig. 7 is a detail viewin section, illustrating the eccentric governor. Fig. 8 is a similarview at right angles to that shown in Fig. 7 g

The object of my invention, more particularly, is to provide means forsimultaneously increasing or decreasing the time and stroke of theinlet-valve-in other words, to increase or diminish the duration of theopening and the lift or amount of the stroke of the valve, whereby theinlet-valve may have a variable duration of the opening and amount ofstroke.

I carry out my invention as follows:

In the drawings, a represents the cylinder of an internal-combustionengine. Mounted upon the cam-shaft of the engine is an eccentric b.

posite end of the cam-rod is extended under the roll k. Beneath therocker is a horizontally-oscillatory arm m, provided with a roll '11,beneath the adjacent end of the cam-rod. This roll a is governed by athrottle-lever q, said lever being constructed with a cam-surface(indicated at r) at its upper end, bearing against a pin 8. upon theframe g. The throttle-lever is fulcrumed upon the shaft 2,, projectingfrom the end of the arm m. The camrod projects between the rolls It anda and is provided, adjacent to said rolls, with a camsurface (indicatedat a) to bear against the roll a at the end of the stroke of thecam-rod.

The pressure of the cam-face it against the roll 11. obviously serves tolift the roll l1, and thereby to open the valve. The amount and time ofsaid opening of the valve is determined by the position of the roll 02.,which is adjusted laterally, as already described, by the lever q. Theextent and duration of the opening of the valve may also be governed bythe stroke of the cam-rod. As shown in Figs. 4, 7, and 8, the stroke ofthe said rod may be varied and governed by the eccentric b. In saidfigures the eccentric is shown having an elongated slot '0, throughwhich the camshaft 20 projects. A weight as is shown attached to theeccentric governed by aspring y. I do not, however, limit myself to anyparticular mechanism for governing the eccentric, as any ordinarysteam-engine governor employed to govern the stroke of the eccentricmight be employed. lVhen the stroke of the cam-rod is governed by theeccentric, the roll a need not be laterally movable. The

lever (1 may be actuated in any desired manner, as by a rod which may beconnected to a hand-lever.

It will be seen that by increasing the distance the valve unseatsprovision is made for increasing the amount of the mixture, andconsequently for an increase in power; but by shortening the time of theopening provision is made for maintaining the high velocity of the iniiowing charge when an engine is running slowly, making it possible touse a larger carbureting device.

\Vhat I claim as my invention is 1. In an inlet-valve gear forinternal-combustion engines the combination of a valve, a device foroperating the valve, a reciprocatory cam-rod provided with a cam toactuate said device to simultaneously increase or decrease the durationof the opening and the stroke of the valve, and adjustable means to makethe cam operative for longer or shorter portions of the reciprocationsof said rod.

2. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a shaft, an eccentric upon the shaft, aneccentric-strap, a reciprocatory cam-rod carrying a cam and actuated bysaid strap, a device for operating the valve, and a movable arm belowsaid device, said arm and said device provided with independent rollersbetween which the adjacent end of said rod reciprocates.

3. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a device for operating the valve provided with aroll, a movable arm below said device, provided with a roll, and acam-rod carrying a cam reciprocatory between said rolls, one of saidrolls adjustable to make more or less of the cam operative to open thevalve.

4. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a device for operating the valve provided with aroll, a movable arm below said device provided with a roll, and acam-rod having a camface reciprocatory between said rolls to force oneof the rolls away from the other roll during the reciprocation of therod in one direction.

5. In an inlet-valve gear for internal-combustion engines, thecombination of a valve, a device for operating the valve provided with aroll, a movable arm below said device provided with a roll, a cam-rodreciprocatory between said rolls having a cam-face constructed to forceone of the rolls away from the other roll during a portion of thereciprocation of the rod.

6. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a device for operating the valve provided with aroll, a reciprocatory cam-rod to actuate said device, and a movable armbelow said rod provided with a roll to govern the action of the rod,said cam-rod provided with a camsurfacc, said device movable atapproximately right angles to the line of the reciprocation of thecam-rod, and the roll of said arm movable parallel to the direction ofthe reciprocation of the cam-rod. I i

7. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a rocking lever to engage the stem of the valvefor operating the valve, a reciprocatory cam-rod to actuate the rockinglever, and a horizontally-oscillatory arm beneath the camrod to governthe operation of said cam-rod.

8. In an inlet-valve gear for internal-combustion engines, thecombination of a valve, a rocking lever provided with a roll to actuatethe valve, an oscillatory arm provided with a roll, and a cam-rodprovided with a camsurface movable between said rolls, to actuate therocking lever, the action of the cam-rod governed by the position of theoscillatory arm.

9. In an inlet-valve gear for internal-combustion engines thecombination of a valve, a rocking lever for operating the valve, acamrod provided with a cam-surface to actuate the rocking lever, and ahorizontally-oscillatory arm beneath the cam-rod to make the operationof the cam-rod more or less effective.

10. In an inlet-valve gear for internal-combustion engines, thecombination of a valve, a device for operating the valve provided with aroll, a movable arm below said device provided with a roll, areciprocatory cam-rod provided with a cam-surface to actuate said devicereciprocatory between said rolls, the cam-surface of said rod bearingupon the roll of the movable arm.

11. In an inlet-valve gear for internal-combustion engines thecombination of a frame, a valve, a device for operating the valve, areciprocatory cam-rod to actuate said device, a movable arm below saiddevice to govern the action of the rod, and a lever mounted upon themovable arm to actuate said arm, said lever provided with a cam-surfacebearing against the adjacent portion of the frame.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ALANSON P. BRUSH.

\Vitnesses:

N. S. WRIGHT, OLA RICHARDSON.

